Sparking-circuit controller for explosion-engines.



am 0 9 1 6 2 Y A M D E T N E T A P W 0 D R W SPARKING CIRCUIT CONTROLLER FOR EXPLOSION ENGINES.

APPLIUATIDN FILED P33. 3. 1904.

2 SHEETS-SHEET 1.

liwezil'or:

No. 888,597. PATENTED MAY 26, 1908.

W. B. DOW.

SPARKING GIROUIT CONTROLLER FOR EXPLOSION ENGINES.

APPLIUATION IILBD FEB. s. 1904.

2 SHEETS-SHEET 2.

UNIT

wittannnfnow', or BRQimnEE, MASSACHUSETTS.

'srAa mq-G-omom'r eon'raoLLEn FOB nxrLosrofi-nuoms.

No seeen Specification of Letters Patent, Patented'llay as, 1908;.-

Application filed February a, 1 Serial 19am.

To all 4127mm it ma'y concern:

' Be it'known that I, WILLARD- E. 'Dow ,a

citizen of thefUnited States, and resident 's quick in theirmovernents', making it possible" Braintree, in 'the Commonwealth of Massachusetts, have invented an Improved Spark-1 I ing-Circuit Controller for Ex'plos'iomEngines,

cuits o I a I lMounted in a suitable back-plate a, are one or more sets of contactsa a,

of which the following descriptiqm-in' con nee:

specification. I Y

My invention rs particularly adaiptedto high-speed service, such as is require in .con-

ion with the accompanying drawings, is a I nection with as-engine'igniters,.and the like, the leadin o jects thereof being to provide quick an sensitively res onsivei action,- smooth running in either direction, simple anddurable construction, and economy of cost and operation.

The constructional'detailsand operation, together with further advantages thereof,

wi l be ointed out in the courseof the fol-" lowing escri-ption, reference being had tothel can ing d'rawingsl Int e rawi'ngs Fi' ure-1-is aerspectlve view of a preferred'm odiment o my inven:

,tion, the removable cap bein broken away for olearness of disclosure. ig. 2 is a. front elevation thereof. Fig. 3 is a sectional view 'taken on the line 3 3, Fig. 2. Fig. A is a fragmentary perspective 'view, showin a modified construction. Figs. 5 7 are ia grammatio views, illustrating various adapta- I i lons'in use.

It will be understood that my present .in-- ventionjs ada ted' to generaluse although speciallfy gas-engines.

shown for convenience of -i'llustration,;tl1e movable members,,or spring contact-makers,

' a being oarried by-posts a extendin from v the plate a, and the stationary 'mem ers a being ad'ustably carried in posts a*, 'insulate'.d at d an provided'with binding screws a at; the rear of the back-plate Cobpe'ra-ting with said sets of'contacts, is a 'rotar rupte'r, centrally journaled in the has -plate, I and'comprising a disk a fast on -a hub a of a shaft a, the latter being the engine shaft; in a 2-oycle engine, or an auxilia shaft in a 4-.- oycle-engine. I The disk a has at'eral flanges a '03, preferably perheral, and in the recess f between them mount one. or more small tripping wheels, a, so as topro'eot therefrom 1n the path of the sprin s.a i-. he springseictend uniformly thin-a'n' light'their 'inten ed for use with sparking o1r our sets being interentire length, and terminate attheir free ends-,substantially at the point of ngency with said disk, being instantly respons v'eand to run at'high speed and withoutsacrificing y, arranging the springs tangential to the disk and terminating them at substantially their nearest point to the disk, the wheel, 0,, leaves them quickly andtheir movement'is .action experienced when the springs are en-' gagedQbaok from their ends a considerable 'distan'oe and carry projecting lugs or enga viated, the action is as safe, regular and definiteuponreversing the en ine as in running ahead, and extreme-durability is assured: It will be'understood that the number of of use,.'the .form shown'in ig. 1 being, em'. ployed for Ta -4c ylin der engine, each set of. contacts cooperating in cojnnectionwith itsown spark coil. In a multi-cyole' engine,- 'wl1ere-,one coil only is employed, there is one set of contacts operated y-as many wheels 'as there are cylinder s in the engine. I I v. In Figs. 5 7' I have shown 2, 3 and 4 wheels respectively, for 'use, in a 2Qylinder and infa 3-cylinder and 4- cylinder engine res ectively, with one ioil, itbeing understood thahwhere one s ark coil onlyis used for more than'one cyli'n number-ofwheels as cylinders.

The'back-'plate is provided with a handle; a so that ,it oan rotated slightly, for

The apparatus is-inclosed by a suitable maven or oapfa, removably secured; by ;any

n operation, as the rotatoroor disk is turned the "wheeliorwheels a enga e a tangential spring a, one after the ot er, and themselves instantl roll or turn incontact therewith in the ,directionflogposite to the I isk," givin a movement of their carrier grecision and: certainty of" closing-effects.

free, certain, quick and, sharp. The sluggish ingdevioes at their free-ends s entirely 0' .75. WheQlS=a :,1S varied aoeordin totheconditions der, Iprovide the same changing thelead oitiming of the apparatus; f

"suitable means, as b' a" bayonet-inn t, pom- I siredmumbenot triplping wheels q? arranged-.7

efateiindividually the sprin s themselves, but the action is uick an certain, and, although thin and light, there is no danger of injury or undue wear and friction upon reversing the engine. The duration of contact may be regulated by adjusting the member c I I am aware that it is old to employ a spring having a cam lug at its free end to be lifted by a cam notch on the disk or wheel, (see British Patent No. 15,018 of 1901) and I do not claim the same, one object of my invention being to obviate the sluggishness produced by the momentum of said cam lug.

My invention is restricted to having a nonweighted, or uniformly thin, spring engaged by the disk or wheel at its thin, nonweighted extreme tip end, thereby obtaining/the uick,

sensitive action that enables me to o tain precision of discharges at exceedingly high speeds. L

Various modifications may be resorted to Without departing from the spirit and scope of my invention.

Having described my invention, what I claim and desire to secure by Letters Patent of the United States, is: I

l. A rotary interrupter, comprising a rotary device provided with a trip ing projection, and a series of straight, eaf contact springs extending tangentially of the said trippin projection, an adjustab e contact for eac spring extendim toward the middle of said spring on the side thereof oposite said rotary device, each-spring being held rigidly at its outer endin free suspension in the plane of said tangency and being' thin, light, non-weighted and uniform in thickness from its support to its extreme free end, the latter terminating substantially at said point of tangency with the path of said tripping projection, and being engaged at its free tip end by the tripping projection as the latter is revolved by said trlpping device.

2 A rota'ry interrupter, comprising a shaft, a ,carrier disk fast thereon, said disk having a groove, a small tripping wheel freely pivoted in'said groove to project beyond said disk, a movable back-plate next to said disk, a series of contact s rings and cooperating stationary contacts fixed on said back-plate and extending freely over said groove but out of contact with the Walls thereof, said springs being uniformly thin and non-weighted throughout their length, extending tangentially in-the path of said tripping wheel, and terminating .to be engaged at their tip ends. by said wheel, and a handle; for rocking said back-plate and contacts with relation to said disk and tripping wheel.

In witness whereof, I have signed my name to this; specification in the presence of two subscribing witnesses.

WILLARD E. DOW. Witnesses: r

GEO. H. MAXWELL, E. L. GoDrNe.

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